Method for Transmitting Channel Quality Information, and Apparatus for Same

1. A method for transmitting channel quality information from a user equipment in a wireless communication system that supports coordinated multiple point transmission and reception (CoMP), the method comprising: receiving CoMP configuration information from a serving transmission point, wherein the CoMP configuration information indicates which transmission point is a data transmission point or a beam avoidance point among a plurality of transmission points belonging to a first CoMP set comprising one or more data transmission points and one or more beam avoidance points; receiving first downlink signals from the one or more data transmission points belonging to the first CoMP set and second downlink signals from the one or more beam avoidance points; generating first channel quality information by calculating combined estimation SINR (Signal to Interference and Noise Ratio) per downlink subband among N downlink subbands, wherein the combined estimation SINR per downlink subband is calculated by regarding the first downlink signals as effective signals, the second downlink signals as interference signals and received signals from cells other than the plurality of transmission points belonging to the first CoMP set as noise signals; selecting M downlink subbands (N>M>l, M, N are integers) among N downlink subbands according to the first channel quality information; and transmitting second channel quality information of each transmission point belonging to the first CoMP set on the M downlink subbands to the serving transmission point respectively, wherein the second channel quality information is calculated by using measurement strengths of the first or second downlink signal received from each transmission point belonging to the first CoMP set on the M downlink subbands and the noise signals, the noise signals only including received signals from cells other than the plurality of transmission points belonging to the first CoMP set.

2. The method according to claim 1 , wherein the CoMP configuration information includes CoMP mode information indicating dynamic cell selection (DCS), joint processing (JP), or cooperative scheduling/cooperative beamforming (CS/CB), and the M downlink subbands are selected considering the CoMP mode information.

3. The method according to claim 1 , wherein the CoMP configuration information includes a flag field indicating whether the transmission point is the data transmission point or the beam avoidance point.

4. A user equipment configured to transmit channel quality information in a wireless communication system that supports coordinated multiple point transmission and reception (CoMP), the user equipment comprising: a radio frequency (RF) unit; and a processor configured to control the RF unit, wherein the processor is configured to: receive CoMP configuration information from a serving transmission point, wherein the CoMP configuration information indicates which transmission point is a data transmission point or a beam avoidance point, among a plurality of transmission points belonging to a first CoMP set comprising one or more data transmission points and one or more beam avoidance points, receive first downlink signals from the one or more data transmission points belonging to the first CoMP set and second downlink signals from the one or more beam avoidance points, generate first channel quality information by calculating combined estimation SINR (Signal to Interference and Noise Ratio) per downlink subband among N downlink subbands, wherein the combined estimation SINR per downlink subband is calculated by regarding the first downlink signals as effective signals, the second downlink signals as interference signals and received signals from cells other than the plurality of transmission points belonging to the first CoMP set as noise signals, select M downlink subbands (N>M≧1, M, N are integers) among N downlink subbands according to the first channel quality information, and transmit second channel quality information of each transmission point belonging to the first CoMP set on the M downlink subbands to the serving transmission point respectively, wherein the second channel quality information is calculated by using measurement strengths of the first or second downlink signal received from each transmission point belonging to the first CoMP set on the M downlink subbands and the noise signals, the noise signals only including received signals from cells other than the plurality of transmission points belonging to the first CoMP set.

5. The user equipment according to claim 4 , wherein the CoMP configuration information includes CoMP mode information indicating dynamic cell selection (DCS), joint processing (JP), or cooperative scheduling/cooperative beamforming (CS/CB), and the M downlink subbands are selected considering the CoMP mode information.

6. The user equipment according to claim 4 , wherein the CoMP configuration information includes a flag field indicating whether the transmission point is the data transmission point or the beam avoidance point.